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A student titrated a 10 mL sample of a saturated solution of borax. If the titration required 23.95 mL of 0.2556 M HCL to reach the endpoint, calculate the equilibrium molar concentration of B4O5(OH)(4 in the saturated solution.
A Breathalyzer instrument contains two ampules, each of which contains 0.75 mg K2Cr2O7 dissolved in 3 mL of 9 mol L^-1 H2SO4(aq). One of the ampules is used as reference. When a person exhales into the tube of the Breathalyzer, the breath is direc..
For the reaction NH4CL(aq)=NH3(g)+HCL(aq),delta g=58.8 kJ and delta h=86.4 kJ. Is this reaction favored. If so, how. What would be the entropy change for the reaction of 2.04 moles of NH4CL(aq) at 349K and 1 atm
Predict the product that is formed when methyl 2-(3-oxocyclohexyl)acetate undergoes
Calculate the amount of heat (cal) necessary to convert 34g of ice at -3oC into liquid water at 25oC.
Consider the case is which the volume and temperature of ONE mole of an ideal gas depends explicitly on the time, t. obtain an equation (a differential equation essentially)
how many carbons does the sample contain
the micronutrient calcium is often applied in the form of calcium (II) sulfate. Write the equation for the formation of calcium (II) sulfate from calcium (II) oxide and an appropriate acid.
If the density of the vinegar solution is 1.00 g?mL, what is the mass percent of acetic acid present?
Aldol condensation: why must aldehyde contain none of corresponding acid? In the aldol condensation with benzaldehyde + acetone (NaOH, ethanol) --> dibenzalacetone
Acetylene gas (C2H2) is produced by adding water to Calcium carbide CaC2. How many grams of acetylene are produced by adding water to 5g CaC2?
A reaction has an activation energy of 110 kJ/mol and a rate constant, k=1.2 x 10^-12 s-1 at 0?C. At what temperature will the rate constant k=5.1 x 10^-7 s-1.
The delta G inital for the dissociation of an aqueous solution of a weak acid at 25 degrees celcius is 14.8 kJ. What is the calue of Ka for the acid?
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